CN101623716A - Preparation method of metal tube - Google Patents
Preparation method of metal tube Download PDFInfo
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- CN101623716A CN101623716A CN200910012848A CN200910012848A CN101623716A CN 101623716 A CN101623716 A CN 101623716A CN 200910012848 A CN200910012848 A CN 200910012848A CN 200910012848 A CN200910012848 A CN 200910012848A CN 101623716 A CN101623716 A CN 101623716A
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Abstract
The invention discloses a preparation method of a metal tube, which is characterized in that the method comprises the following steps: (1) pouring metal liquid to a mould with a mold core, and preparing a metal tube blank; (2) removing the mold core and oxide scale; (3) under the condition of inert gas, heating to alloy plastic deformation temperature range, and keeping the temperature for 1 to 3 hours; (4) coating a layer of lubricant, and then performing hot extrusion; (5) cropping, straightening and removing the oxide scale by scouring to obtain the finished product metal tube. The method of the invention directly casts the metal tube blank with opening structure, improves the utilization ratio of material, simplifies the manufacturing process of the metal tube and saves production cost, and prepared metal tube has high appearance quality.
Description
Technical field
The invention belongs to the material technology field, particularly a kind of preparation method of metal tube.
Background technology
Metal pipe material occupies an important position at modern industry, national defence, civil area, and tubing is widely used in various fluids such as carrying Oil, Water, Gas as carrier pipe; Be used for mechanical manufacturing field in a large number as structural tube; Simultaneously, in national defense industry, be used to make various weapons and Aerospace Products.Along with fast development of modern industry; the demand of precision, thin-walled, high-performance tubing increases rapidly; each state has all dropped into the research that great amount of manpower and material resources, financial resources are developed new technology, new equipment, and metal pipe material is day by day to scale, many kindizations, specialized direction development.
The traditional handicraft of metal tube comprises following basic working procedure: pipe preparation, heating of pipe blank, perforation, tube rolling, sizing, finishing etc., its main technological process is: ingot casting, cogging, hot piercing, cold rolling.At first, the expense of pipe preparation is higher, have in addition can reach the metal tube preparation cost 70%.For example, traditional seamless steel tube production generally adopts steel ingot, continuous casting square billet or strip plate with base, and the production cycle is long, and needs repeatedly crop in the production process, has increased metal consumption, has improved production cost.Secondly, hot piercing is first road distortion operation in the traditional mode of production process, cause the pipe internal fissure in the perforation procedure easily, press against wounds, a kind of rhyme scheme in Chinese operas serving as the prelude to a complete score for voices and scratch, glue defectives such as metal, external crack, these defectives can't be eliminated in cold rolling, the Cold Drawing Process of postorder and constantly amplify, this will make product quality even cause waste product, strengthen production cost.
Summary of the invention
At above problem, the invention provides a kind of preparation method of metal tube, purpose is to reduce the processing step of preparation metal tube, reduces to consume, and improves product percent of pass.
Method of the present invention may further comprise the steps:
1, with pouring metal melt in the casting mold that has core, preparation metal pipe, the wall thickness of pipe is by the internal diameter decision of the diameter and the casting mold of core;
2, the core in the removal metal tube base under normal temperature condition, the oxide skin of removal metal pipe surfaces externally and internally.
3, under inert gas conditions, the metal pipe is heated in alloy plastic deformation's temperature range of this metal tube insulation 1～3h.
4, at least 1 layer of lubricant of metal pipe surface-coated after insulation finishes carries out hot extrusion then, and extrusion ratio is 2～20.
5, the pipe after will pushing carries out crop, aligning, pickling scale removal according to a conventional method under normal temperature condition, obtains the finished product metal tube.
6, need further when cold rolling when metal tube, adopt cold-rolling equipment that metal tube is cold rolling, obtain to require the metal tube of wall thickness and internal diameter.
Above-mentioned core is clay sand core, sodium silicate sand core or resin sand core.
Above-mentioned lubricant is glass dust lubricant or graphitic lubricant, and the consumption of every layer of lubricant is as the criterion to cover metal pipe surfaces externally and internally.
Above-mentioned inert gas is nitrogen or argon gas.
Method of the present invention adopts the directly metal pipe of casting open-celled structure, has improved the utilization rate of material, has saved the step of hot piercing, the material unaccounted-for (MUF) of having avoided hot piercing to cause, simplified the preparation process of metal pipe material, saved production cost, the metal pipe material apparent mass height of preparation.
Description of drawings
Fig. 1 is the metal tube finished product photo figure in the embodiment of the invention 4.
The specific embodiment
The hot extrusion equipment that adopts in the embodiment of the invention is general industry hot extrusion equipment.
Graphitic lubricant that adopts in the embodiment of the invention and glass dust lubricant are commercial product.
The resin sand core that adopts in the embodiment of the invention, sodium silicate sand core, clay sand core are casting industry core commonly used.
Embodiment 1
Adopt the sand casting mode to prepare high temperature alloy metal pipe, the column type clay sand core is placed casting mold, casting metal liquation in casting mold, the cooling back forms external diameter 60mm, internal diameter 20mm, wall thickness 20mm, the open-celled structure metal pipe of length 200mm, pouring temperature is 1450 ℃; Wherein metal pipe material is high temperature alloy K418.
After cast finishes, remove the clay sand core in the metal tube base under normal temperature condition, the oxide skin of metal pipe surfaces externally and internally is removed in turning then.
The metal pipe of scale removal is placed heating furnace, under the nitrogen protection condition, the metal pipe is heated to 1140 ℃, insulation 3h, apply 1 layer of glass dust lubricant at metal pipe surfaces externally and internally then, adopt hot extrusion equipment to carry out hot extrusion, extrusion ratio is 3; Adopt conventional method to carry out crop, aligning then, obtain metal tube finished product, metal tube external diameter 40mm, wall thickness 6mm, metal tube any surface finish behind the pickling scale removal.
Embodiment 2
Adopt the sand casting mode to prepare the metal pipe, the column type resin sand core is placed casting mold, casting metal liquation in casting mold, the cooling back forms external diameter 80mm, internal diameter 30mm, wall thickness 25mm, the open-celled structure metal pipe of length 200mm, pouring temperature is 1490 ℃; Wherein metal pipe material is an austenitic stainless steel.
After cast finishes, remove the resin sand core in the metal tube base under normal temperature condition, the oxide skin of metal pipe surfaces externally and internally is removed in turning then.
The metal pipe of scale removal is placed heating furnace, under the nitrogen protection condition, the metal pipe is heated to 1150 ℃, insulation 3h applies 2 layers of glass dust lubricant at metal pipe surfaces externally and internally, adopts hot extrusion equipment to carry out hot extrusion, and extrusion ratio is 7; Adopt conventional method to carry out crop, aligning then, obtain metal tube finished product, metal tube external diameter 40mm, wall thickness 6mm behind the pickling scale removal.
Embodiment 3
Adopt the sand casting mode to prepare the metal pipe, the column type sodium silicate sand core is placed casting mold, casting metal liquation in casting mold, the cooling back forms external diameter 100mm, internal diameter 40mm, wall thickness 30mm, the open-celled structure metal pipe of length 200mm, pouring temperature is 750 ℃; Wherein metal pipe material is the A356 aluminium alloy.
After cast finishes, remove the sodium silicate sand core in the metal tube base under normal temperature condition, the oxide skin of metal pipe surfaces externally and internally is removed in turning then.
The metal pipe of scale removal is placed heating furnace; under the nitrogen protection condition, the metal pipe is heated to 250 ℃, insulation 1h; apply 1 layer of colloidal graphite mixed with water at metal pipe surfaces externally and internally; adopt hot extrusion equipment to carry out hot extrusion then, extrusion ratio is 11, adopts conventional method to carry out crop, aligning; the pickling scale removal; adopt cold-rolling equipment to be cold-rolled to external diameter 10mm again, wall thickness 2mm obtains the metal tube finished product.
Embodiment 4
Adopt the sand casting mode to prepare the metal pipe, the column type resin sand core is placed casting mold, casting metal liquation in casting mold, the cooling back forms external diameter 100mm, internal diameter 40mm, wall thickness 30mm, the metal pipe of length 200mm, pouring temperature is 700 ℃; Wherein metal pipe material is the AZ31 aluminium alloy.
After cast finishes, remove the resin sand core in the metal tube base under normal temperature condition, the oxide skin of metal pipe surfaces externally and internally is removed in turning then.
The metal pipe of scale removal is placed heating furnace, under the argon shield condition, the metal pipe is heated to 350 ℃, insulation 1h; Apply 1 layer of graphitic lubricant at metal pipe surfaces externally and internally, adopt hot extrusion equipment to carry out hot extrusion then, extrusion ratio is 4, adopt conventional method to carry out crop, aligning, the pickling scale removal, with cold-rolling equipment that blank tube material is cold rolling, acquisition requires the metal tube finished product of wall thickness and internal diameter, as shown in Figure 1.
Claims (4)
1, a kind of preparation method of metal tube is characterized in that carrying out according to the following steps: (1) in the casting mold that has core, prepares the metal pipe with pouring metal melt; (2) core in the removal metal tube base under normal temperature condition, the oxide skin of removal metal pipe surfaces externally and internally; (3) under inert gas conditions, the metal pipe is heated in alloy plastic deformation's temperature range insulation 1～3h; (4) at least 1 layer of lubricant of metal pipe surface-coated after insulation finishes carries out hot extrusion then, and extrusion ratio is 2～20; (5) pipe after will pushing carries out crop, aligning, pickling scale removal, obtains the finished product metal tube.
2, the preparation method of a kind of metal tube according to claim 1 is characterized in that described core is clay sand core, sodium silicate sand core or resin sand core.
3, the preparation method of a kind of metal tube according to claim 1 is characterized in that described lubricant is glass dust lubricant or graphitic lubricant.
4, the preparation method of a kind of metal tube according to claim 1 is characterized in that described inert gas is nitrogen or argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100128485A CN101623716B (en) | 2009-07-31 | 2009-07-31 | Preparation method of metal tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100128485A CN101623716B (en) | 2009-07-31 | 2009-07-31 | Preparation method of metal tube |
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| CN101623716A true CN101623716A (en) | 2010-01-13 |
| CN101623716B CN101623716B (en) | 2011-06-22 |
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| CN2009100128485A Expired - Fee Related CN101623716B (en) | 2009-07-31 | 2009-07-31 | Preparation method of metal tube |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463272A (en) * | 2010-11-08 | 2012-05-23 | 北京有色金属研究总院 | Short-flow preparation method of minor-caliber nickel-based alloy thin-wall tubes |
| CN103451499A (en) * | 2013-08-28 | 2013-12-18 | 中联重科股份有限公司 | Light alloy, conveying pipe and preparation method thereof |
| CN107641747A (en) * | 2017-08-31 | 2018-01-30 | 巢湖鹏远金属焊管有限公司 | A kind of metal mold antirust corrosion-proof running water pipe |
| CN107641748A (en) * | 2017-08-31 | 2018-01-30 | 巢湖鹏远金属焊管有限公司 | A kind of antibacterial anticorrosion pipeline and preparation method thereof |
| CN107675050A (en) * | 2017-09-01 | 2018-02-09 | 巢湖鹏远金属焊管有限公司 | A kind of casting type pipeline and preparation method thereof |
| CN111750193A (en) * | 2020-06-16 | 2020-10-09 | 新泰市鼎鑫工贸有限公司 | Yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron elbow tee joint and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100421835C (en) * | 2004-03-18 | 2008-10-01 | 振兴机械股份有限公司 | Method for founding pipes |
| CN101036943A (en) * | 2007-04-27 | 2007-09-19 | 哈尔滨工业大学 | Method for preparing non-crystal alloy tube |
-
2009
- 2009-07-31 CN CN2009100128485A patent/CN101623716B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463272A (en) * | 2010-11-08 | 2012-05-23 | 北京有色金属研究总院 | Short-flow preparation method of minor-caliber nickel-based alloy thin-wall tubes |
| CN103451499A (en) * | 2013-08-28 | 2013-12-18 | 中联重科股份有限公司 | Light alloy, conveying pipe and preparation method thereof |
| CN103451499B (en) * | 2013-08-28 | 2015-07-22 | 中联重科股份有限公司 | Light alloy, conveying pipe and preparation method thereof |
| CN107641747A (en) * | 2017-08-31 | 2018-01-30 | 巢湖鹏远金属焊管有限公司 | A kind of metal mold antirust corrosion-proof running water pipe |
| CN107641748A (en) * | 2017-08-31 | 2018-01-30 | 巢湖鹏远金属焊管有限公司 | A kind of antibacterial anticorrosion pipeline and preparation method thereof |
| CN107675050A (en) * | 2017-09-01 | 2018-02-09 | 巢湖鹏远金属焊管有限公司 | A kind of casting type pipeline and preparation method thereof |
| CN111750193A (en) * | 2020-06-16 | 2020-10-09 | 新泰市鼎鑫工贸有限公司 | Yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron elbow tee joint and preparation method thereof |
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| Publication number | Publication date |
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| CN101623716B (en) | 2011-06-22 |
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